32/64bits binaries:
av1-1.0.0-654-gd0076f507:
https://mega.nz/#!kto20KoR!XbcrlXv7Q...lZx3X0tfeVwJx4
64bits binaries only (I don't have a 32bits toolchain in my MSYS2 env):
dav1d-0.0.1-37-9075f0e:
https://mega.nz/#!co5wFQyQ!EZhG33K4z...mdYdPPtDJqCWBw
The dav1d build has been patched so that the input/output files are opened in binary mode, for the reasons previously explained. Band-aid solution until the PR is accepted upstream.